Photos of entries were sent to the Science Museum Group, and the judges chose ten year old Matthew Martyn's creation – the 'Science Museum snake' – as the winner (pictured).

Matthew, the son of Ammtek director Andrew Martyn, won a box of Science Museum branded goodies.

Runners up included five year old Isla Yip-Checuz, daughter of Monica Yip from Celadon, and Karen Lawler from Hachette Children's Books. Both will receive prizes.

Creative exec Deborah Jones said: "We judged on best use of the putty and additional arms and legs, so overall artistic merit was the main criterion rather than any scientific motivation."

Wow Stuff produces Science Museum Alien Putty. The product is available from Sainsbury's, WH Smith, Next and House of Fraser.

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